Comment 2 for bug 1219008

1). I am OK with the current one. Adding the tree name will make the subject too long
2a) yes this is the sender's email address
2b) this is when the user send an email via the contact link
3) When I click reply to respond to the sender, since the person who sent the message is not part of the email headers, the email will by default go back to me unless I paste in the sender's email address.